Electromagnetic flow meter can be used to measure the volume flow of conductive fluid in a closed pipeline. The electromagnetic meter is widely applied in flow measurement and control in the fields of chemical and petroleum industry, metallurgy industry, water and waste water, agriculture and irrigation, paper making, food and beverage industry and pharmaceutical industry.

The measuring principle of the electromagnetic meter is based on the electromagnetic induction law of Faraday. The sensor is mainly composed of a measuring tube with an isolated lining, a pair of electrodes installed by penetration of the measuring tube wall, a pair of coils and an iron core to produce a working magnetic field. When the conductive fluid flows through the measuring tube of the sensor, the voltage signal in direct proportion to the average flow velocity of the fluid will be inducted on the electrodes. The signal of the electromagnetic flow meter is amplified and treated by the transmitter to realize various display functions.